Free JN0-662: Service Provider Routing and Switching, Professional Exam Questions and Answers
Service Provider Routing and Switching, Professional is exam JN0-662, part of the Juniper Networks Certification Program. Juniper's written exams share one format across every track and level: 65 multiple-choice questions in 90 minutes, delivered by Pearson VUE. The JN0- code carries the track in its second digit — 3 is security, 4 enterprise routing and switching, 5 Mist AI, 6 service provider, 8 data centre — and the level in the first, running Associate, Specialist, Professional and Expert.
The first 10 questions on this page are free to read, answers included — no account and no card. A plan opens the rest of the bank, the full timed practice test and your weak-topic reporting.
Last updated: September 16, 2026
- Exam code
- JN0-662
- Provider
- Juniper
- Questions in our bank
- 1000+
- Free to read
- First 10, with answers
- Official page
- Official Exam website
- Our test mode duration & pass mark
- 130 mins · 70%
Recommended: Switch to Test Mode to start a practice test that simulates the real exam experience.
Question #1
In a service provider network, what is the primary function of the Core Layer?
Please select an optionIncorrectCorrect answer: C
The Core Layer is responsible for high-speed and reliable data transfer throughout the network.
Was this answer correct?Question #2
When deploying MPLS in a service provider environment, what is the purpose of the Label Distribution Protocol (LDP)?
Please select an optionIncorrectCorrect answer: D
LDP is used to distribute labels to establish Label Switched Paths (LSPs) for traffic forwarding in MPLS.
Was this answer correct?Question #3
What feature does the IGMP snooping provide in a Layer 2 network?
Please select an optionIncorrectCorrect answer: B
IGMP snooping helps manage multicast traffic by listening to IGMP messages and forwarding multicast traffic appropriately.
Was this answer correct?Question #4
In which multicast routing protocol does a designated router analyze and determine the best multicast path?
Please select an optionIncorrectCorrect answer: B
PIM-SM (Sparse Mode) uses a designated router to optimize multicast delivery paths.
Was this answer correct?Question #5
What is the function of a Route Reflector in BGP?
Please select an optionIncorrectCorrect answer: B
Route Reflectors allow iBGP routers to share routes without needing a full mesh of peering sessions.
Was this answer correct?Question #6
Which of the following statements is true regarding MPLS traffic engineering?
Please select an optionIncorrectCorrect answer: C
MPLS traffic engineering allows for efficient bandwidth management and can help alleviate network congestion.
Was this answer correct?Question #7
When configuring OSPF, what is the default OSPF cost of an Ethernet interface?
Please select an optionIncorrectCorrect answer: B
The default OSPF cost for an Ethernet interface is set to 10, which can influence OSPF path selection.
Was this answer correct?Question #8
What type of BGP route is preferred by default in a routing decision process?
Please select an optionIncorrectCorrect answer: C
BGP prefers internal routes (those learned from iBGP peers) over external routes (those learned from eBGP peers).
Was this answer correct?Question #9
What protocol is mainly used for network authentication in modern service provider networks?
Please select an optionIncorrectCorrect answer: C
RADIUS (Remote Authentication Dial-In User Service) is widely used for user authentication in networks.
Was this answer correct?Question #10
When implementing VPLS, what protocol is typically used to manage the pseudo-wire connections?
Please select an optionIncorrectCorrect answer: D
LDP is commonly used to provision and manage pseudo-wires in VPLS deployments.
Was this answer correct?
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Other Juniper certifications
- JN0-347: Enterprise Routing and Switching, Specialist (JNCIS-ENT) (opens in a new tab)
- JN0-634: Security Professional (JNCIP-SEC) (opens in a new tab)
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- JN0-360: Juniper Networks Certified Internet Specialist SP (JNCIS-SP) (opens in a new tab)
- JN0-104: Junos, Associate (JNCIA-Junos) (opens in a new tab)
- JN0-230: Security, Associate (JNCIA-SEC) (opens in a new tab)
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FAQ
Learn More: https://www.juniper.net/us/en/training/certification.html
- Q1: What is the JN0-662: Service Provider Routing and Switching, Professional exam?
- A: JN0-662: Service Provider Routing and Switching, Professional is a Juniper certification exam. Judging by the questions in our bank, it concentrates on provider, MPLS, routing, juniper and OSPF.
- Q2: What topics does the JN0-662: Service Provider Routing and Switching, Professional exam cover?
- A: Questions in our JN0-662: Service Provider Routing and Switching, Professional bank cluster around provider, MPLS, routing, juniper, OSPF, router, route and label. Working through the full set is the quickest way to find which of these you are weakest on.
- Q3: How should I prepare for JN0-662: Service Provider Routing and Switching, Professional?
- A: Work through the JN0-662: Service Provider Routing and Switching, Professional practice questions here, checking your answer on each one, then sit the practice test to rehearse the exam under timed conditions before the real thing.
- Q4: Are these real JN0-662: Service Provider Routing and Switching, Professional exam questions?
- A: They are drawn from officially released past questions and from community members who have sat JN0-662: Service Provider Routing and Switching, Professional. Answers are verified and updated weekly.
- Q5: Where do I register for the JN0-662: Service Provider Routing and Switching, Professional exam?
- A: Register through Juniper directly at https://www.juniper.net/us/en/training/certification.html. Exampractice is not affiliated with Juniper and does not administer the exam.
- Q6: Is there a free JN0-662: Service Provider Routing and Switching, Professional sample?
- A: Yes. Every JN0-662: Service Provider Routing and Switching, Professional page shows a free sample of real questions. Upgrading opens the full bank and the practice test.
- Q7: What are Juniper Certification Exams?
- A: Juniper Certification Exams validate your expertise in using and managing Juniper Networks’ products and solutions, including routing, switching, security, and automation. These certifications demonstrate your proficiency in deploying, configuring, and troubleshooting Juniper technologies to optimize network performance and security.
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- A: Juniper Certification enhances your professional credibility, showcasing your skills and knowledge in networking and security. This can lead to better job opportunities, higher salaries, and career advancement in IT, networking, and cybersecurity roles.
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- A: Benefits include recognition as a certified Juniper professional, improved job performance, access to exclusive resources, continuing education opportunities, and staying current with the latest Juniper technologies and best practices.
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- A: Network engineers, system administrators, security professionals, and anyone involved in managing and implementing Juniper Networks’ solutions should consider these certifications to validate their expertise and advance their careers.
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- A: Juniper offers various certification paths, including:
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- A: Preparation can include official Juniper training courses, study guides, practice exams, online tutorials, and hands-on experience with Juniper products and solutions.
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